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Finding the Fourth Proportional to 66,433,978.20, 99,650,967.30 and 57,186,904.80

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Solution

The fourth proportional to 66,433,978.20, 99,650,967.30 and 57,186,904.80 is: 85,780,357.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,433,978.20 : 99,650,967.30 = 57,186,904.80 : x
  2. Step 2: Convert to fraction form
    66,433,978.20/99,650,967.30 = 57,186,904.80/x
  3. Step 3: Cross multiply
    66,433,978.20x = 99,650,967.30 × 57,186,904.80
  4. Step 4: Simplify right side
    66,433,978.20x = 5,698,730,380,213,013
  5. Step 5: Solve for x
    x = 5,698,730,380,213,013/66,433,978.20
  6. Step 6: Final answer
    x = 85,780,357.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.